JP2668227C - - Google Patents

Description

The present invention relates to an apparatus for pneumatically transporting a material such as a granular material by a gas such as air or argon while mixing a material from a material supply source with an air flow. The present invention relates to a material supply device for feeding a material into a transport pipe. (Prior Art) Conventionally, there are many known material supply devices for this type of pneumatic transport device. For example, there are (a) a well-known ejector feeder and (b) a material supply device described in Japanese Utility Model Application Laid-Open No. 62-191730. The ejector feeder of the above (a) has a configuration in which compressed air is ejected from a nozzle, and a material (powder or granule) is sucked by utilizing a partial vacuum generated in the jet, and is blown out together with the ejected air to be sent out. is there. The material supply device of (b) includes a screw feeder connected to an outlet of the material storage tank and an air transport mechanism connected to the outlet of the screw feeder via a check valve. The pneumatic transport mechanism communicates the material inlet on the upper end with the outlet of the screw feeder and forms a material outlet on the lower end, and a discharge passage provided in a state perpendicular to the screw feeder, and a material outlet of the discharge passage. A constricted portion (diffuser), a transport pipe connected to the tip of the constricted portion (diffuser), a pressure air jet nozzle provided in a discharge passage facing the constricted portion (diffuser), and a pressure air jet nozzle The pneumatic transport mechanism described in Japanese Utility Model Laid-Open Publication No. Sho 62-191730 has substantially the same configuration as the ejector feeder (a). As a result, the material supplied from the material storage tank is extruded by the screw feeder, and the extruded material falls into the discharge passage by its own weight, while the lower portion (diffuser) is blown by the air pressure from the compressed air jet nozzle at the lower portion. After that, it is sent into the transport pipe and transported to the right place. (Problems to be Solved by the Invention) According to the conventional example (a), however, the pressure required to transport the material is applied by the pressure energy recovered by the diffuser in the transport pipeline. Since there is little that can convert velocity energy into pressure energy in a part, the pressure rise is also limited. For this reason, there is a problem that the mixing ratio of the transport material to the transport air amount and the transport distance are limited. In order to transport the material without clogging in the conventional example (a), the inner diameter of the material inlet of the ejector feeder and the inner diameter of the transport pipe are designed in consideration of each other. In the case of transporting by a small-diameter transport pipe of about 20 mm or less, if the inner diameter of the material inlet of the ejector feeder is used relatively large, the material supply amount exceeds the transport capacity of the transport pipeline. The material is blocked in the pipe (including the vicinity of the pipe entrance). Conversely, when the inner diameter of the material inlet of the ejector feeder is reduced to match the inner diameter of the transport pipe, the material causes a cross-linking phenomenon near the material inlet of the ejector feeder, or becomes unable to stably transport due to adhesion, There were problems such as a decrease in transportation capacity. Therefore, in this case, it is not suitable to use a small-diameter transport pipe having a reduced inner diameter. For the conventional example (b), the pneumatic transport mechanism is the conventional example (a) as described above.
Because of the substantially same configuration as the ejector feeder, there is a problem that the mixing ratio of the transport material to the transport air amount and the transport distance are limited as described above. Further, the discharge passage of the conventional example (b) is provided vertically without being inclined with respect to the screw feeder. Therefore, when the transport pipe has a small diameter as described above, the speed of dropping the supply material is high, the short path to the material filling chamber is easily performed, and the amount of the filled material is increased. was there. In order to prevent this blockage, a check valve must be provided at the outlet end side of the screw feeder as a means for adjusting the amount of material discharged from the outlet of the screw feeder. The present invention is intended to solve the above-described problem, and to provide a material supply device that can transport a material without clogging even when a transport pipe has a small diameter, has a high mixing ratio, and can increase a transport distance. It is assumed that. In other words, in the present invention, even when the transport pipe has a small diameter, in order to prevent the material supplied from the material filling chamber of the supply device main body from being clogged in the transport pipe, the material filling chamber is formed as a thin layer space. The baffle plate is made to face the material filling chamber while reducing the supply amount of the material, and the material is further adjusted by adjusting the opening cross-sectional area formed between the baffle plate and the inner wall surface of the material filling chamber. In addition to supplying the material in a thin layer and premixing the material with the gas ejected from the nozzle in the space formed downstream of the baffle plate and contacting the material thoroughly, the material is transported into the transport pipe without clogging. It is something to go. (Means for Solving the Problems) As means for solving the above problems, a material supply device for a pneumatic transport device according to the present invention comprises a material inlet at an upper end, a material outlet at a lower end, and material filling. A supply device main body having a chamber formed into a thin laminar space such that a material is filled in a thin layer shape, a transport pipe connected to a material outlet of the supply device main body, and a nozzle provided opposite to the material outlet. And a pneumatic source connected to the nozzle or the transport pipe, and a material supply device for a pneumatic transport apparatus configured to transport the material supplied in the supply apparatus main body through the transport pipe by virtue of the pneumatic source. The material outlet is provided at a position lower than the material inlet so that the material can naturally move downward by the weight of the material, and the material outlet is located above the nozzle. Inner wall of material filling room A baffle for adjusting the cross-sectional area of the opening formed between the baffle and the surface is provided so as to intersect with the flow direction of the material, and in a space formed downstream of the baffle, the material flows from the nozzle. It is characterized in that it is transported while being premixed by the ejected gas. The baffle plate is preferably formed so as to protrude from one end of a connecting short pipe connecting the material outlet of the supply device main body and the transport pipe. It is preferable that the material filling chamber is inclined. The transport pipe connected to the material outlet of the supply device body may be a commonly used large-diameter large-diameter (for example, about 40 mm to 70 mm or more as is well known), but the present invention relates to a transport pipe. Small diameter with an inner diameter several times the diameter of the material to be
It is preferable to use a tube formed in a tube shape of about 20 mm). The use of a small-diameter transport pipe as in the latter has advantages such as not only transporting the material without clogging but also reducing the piping space of the transport pipe. The transport tube may be made of the same material as the material to be transported. (Function) According to the present invention having the above-described structure, the material filling chamber is a disk-shaped thin space so that the material is filled in a thin layer. It contributes to preventing material clogging in the pipeline. In addition, in addition to the above configuration, a baffle plate for adjusting an opening cross-sectional area formed between the material filling chamber and the inner wall surface of the material filling chamber at a position above the nozzle is provided with respect to the material flow direction. Since the materials intersect so as to intersect, the material supplied to the material filling chamber is supplied in a thinner layer at the baffle plate portion, and the material is not blocked (clogged). Further, a space is formed downstream of the baffle plate, and the material is premixed in the space, and then sent out from the material outlet of the supply device main body, so that the material is reliably prevented from being blocked. In the case where the material filling chamber (thin layer space), that is, the supply device main body is inclined, the material does not fall quickly due to its own weight in a short-circuit manner, but gradually falls down the material filling chamber. At that time, when the material reaches the lower part of the material filling chamber, compressed or sucked gas from a pressure-feeding or suction-type pneumatic source connected to a nozzle or a transport pipe provided opposite to the material outlet is applied to the thin-layered material. As a result, the material has a low resistance to gas permeation and the material is loosened. Therefore, a synergistic effect of the effect of the thin layer space and the baffle plate, the effect of forming the material inlet at the upper end side of the material filling chamber and the material outlet at the lower end side, and the effect of compressed gas or suction gas from a nozzle or the like. In addition, since clogging of the material in the material filling chamber and excessive supply of the material are eliminated, it is possible to transport in a stable state without clogging even when a small-diameter transport pipe is used. It should be noted that the pressure-feeding power source and the suction-type power source can be provided side by side, and in that case, both may be selectively used. (First Embodiment) A first embodiment of the present invention will be described below with reference to FIG. 1 and FIG. (F) is a material supply device for pneumatic transportation. This material supply device (F) is made of a circular, square or other appropriately shaped plate-like body, and has a material inlet (IC) at an upper end and a material at a lower end. The outlet (3) is formed, and the thin layer space (2) is formed so that the material (M) such as powder and granules is filled in a thin layer.
A) The supply device body (1) in which the material filling chamber (2) is formed, and the transport pipe (5) connected to the material outlet (3) on one side (front side) of the lower part of the material filling chamber (2). ) And the material outlet (3)
A nozzle (11) provided on the other side (back side) opposite to the above, and an air power source (10) such as a compressor or a blower connected to the nozzle (11). Supply device body
The material supplied in (1) is transported through the transport pipe (5) by the pneumatic force of the pneumatic source (10). The supply device main body (1) includes a main body (1a) forming the material filling chamber (2) described above, and a lid (1b) covering the main body (1a), and (9) is Packing. Dividing the main body (1a) and the lid (1b) in this way has an advantage that the material filling chamber (2) can be easily cleaned. However, it is a matter of course that the material filling chamber (2) may be integrally formed without such a configuration. The supply device body (1) (that is, the material filling chamber (2)) is inclined as shown in the figure,
In addition, the material filling chamber (2) above the ejection hole (12) of the nozzle (11) (the material outlet in FIG. 1)
(3)) has a baffle (7) protruding from one end of a connecting short pipe (4) connecting the material outlet (3) and the transport pipe (5) via a joint (6). It is made to cross in the direction. The baffle plate (7) adjusts an opening cross-sectional area (S) formed between its end face and the inner wall surface of the material filling chamber (2). With such a configuration, the material (M) is supplied in a thinner layer and is easily unraveled, and the material (M) is premixed in the space (X) formed downstream of the baffle plate (7) to be mixed with the material (M). M) is supplied smoothly to the material outlet (3) by gas. Many baffle plates (7) having different protruding lengths are prepared, and can be appropriately replaced according to the physical properties of the material (M). A material from a material supply source (not shown) may be supplied to the material filling chamber (2) of the supply device body (1) from an upstream side by an arbitrary method, but in FIG. It is supplied from the short pipe (8). The nozzle (11) is detachably screwed into a nozzle insertion hole (16) of a nozzle attachment (15) fixed to the lid (1b) of the supply device main body (1). The tip of this nozzle (11) has a lid (1
A filter (14) is interposed between the filter and the filter (b), and an ejection hole (12) is arranged slightly outside the filter (14). The nozzle mounting body (15) has a secondary air inlet (18) in the direction intersecting the nozzle insertion hole (16).
The gas introduced from the secondary air inlet (18) is supplied to the material filling chamber (2) through a gas guide passage (13) formed at the tip of the nozzle (11). It is. Therefore, when the material is pumped and transported by the pneumatic power source (10) of the pumping type, the above-mentioned 2 is used.
The secondary air inlet (18) is closed with a stopper (19) or a valve to prevent the leakage of compressed gas, and the gas is introduced from the gas inlet (20) of the nozzle (11) to the filter (12) through the nozzle outlet (12). 14) The compressed gas from the power source (10) is sent into the material filling chamber (2). In addition, as shown in FIG. 4 showing the second embodiment, when a material is suctioned and transported by a suction type pneumatic source (10),
Close the gas inlet hole (20) of the nozzle (11) with a stopper, a valve, or the like, and open the secondary air inlet (18).
In addition to introducing the secondary air, a suction-type power source (10) such as a vacuum pump may be connected to the transport pipe (5). As described above, in this embodiment, the material is devised so that the material can be transported not only by the pressure feeding method but also by the suction method. However, the secondary air introduction port (18) is formed from the beginning in the nozzle mounting body (15). Needless to say, it is possible to make it impossible to carry out suction-type transportation without carrying out. Further, it is also possible to remove the nozzle (11), the gas conduit ‖, and the pneumatic power source (10) of the pumping type to perform only the suction transport. FIG. 3 shows a material supply device (F) for pneumatic transportation according to the first embodiment, which is connected to a material supply source (25).
), A pump-type pneumatic power source (10) and a transport pipe (5) such as a compressor, and an example of application to a pneumatic-type pneumatic transport device having main components, and a material supply device for the pneumatic transport. (F) is attached by connecting the short pipe (8) to the outlet (25a) of the material supply source (25). A receiving portion (27) such as a synthetic resin molding machine is connected to a terminal side of the transport pipe (5) via a collector (26). (28) is a damper, which may not be provided. (29) is an on-off valve, and (30) is an exhaust filter. The material supply device (F) for pneumatic transportation is not only applicable to the configuration shown in FIG. 3, but can be applied to any other pneumatic transportation device. As described above, the present invention can also be applied to a suction type pneumatic transport device. (Second Embodiment) FIG. 4 shows a second embodiment as described above, which is a material supply device (F) when applied to a suction type pneumatic transport device, and includes a transport pipe (F). The material (M) in the material filling chamber (2) is supplied to the material outlet (3) by the gas suction force of the suction type pneumatic source (10) connected to the end side of (5).
It is to transport by suction. In this case, the gas introduction hole (20) is sealed with a stopper (21) or a valve to open only the secondary air introduction port (18), and outside air is introduced from the secondary air introduction port (18). Alternatively, the discharge side of a suction type pneumatic power source (10) such as a blower or a vacuum pump is connected to a secondary air inlet (18) through a circulation pipe (31) as shown by a dashed line.
By supplying the discharge gas of the power source (10) from the secondary air inlet (18) or supplying dehumidifying gas or hot air from the secondary air inlet (18), the suction type power source is provided. The clogging of the material in the material filling chamber (2) is eliminated by adjusting the suction gas amount of (10). Other configurations are the same as those of the first embodiment. The supply of outside air or the like to the secondary air inlet (18) is performed at any time such as at the time of suction transportation and intermittently or intermittently. In addition, with the introduction of suction gas, outside air, hot air, etc., to the secondary air introduction port (18),
The compressed gas from the pneumatic power source (10) is introduced from the gas introduction hole (20),
The clogging of the material in (2) can be released or prevented. (Third Embodiment) FIG. 5 shows a third embodiment, which is a material supply device (F) applied to a pneumatic transportation device of a pressure feeding type.
Is shown. In this device, the nozzle (11) is inserted into and retracted from the material filling chamber (2) (thin space 2A) so as to be able to advance and retreat, so that the ejection hole (12) of the nozzle (11) is inserted into the material filling chamber (2). ) (Material outlet
(3)), and displace the material (M) near the material outlet (3) of the material filling chamber (2).
) And the amount of gas can be adjusted, and the material is prevented from being clogged. (35) is a positioning pin for positioning the nozzle (11).
Other configurations are substantially the same as those in FIG. FIG. 6 shows a material feeding device (F) inserted into a storage tank (40) and a material fed from a material inlet (1c) of the feeding device main body (1), and a pressure feeding type or a suction type. This shows a configuration in which the material is pressure-fed or suction-transported to the transport pipe (5) by the pneumatic source (10). The supply device main body (1) is not limited to a disk-shaped one as shown in FIG.
May be a disk-shaped body such as a polygon or an ellipse as long as is a thin layer space. In each embodiment, the material filling chamber (2) can be used as a measuring cell with a desired volume (for example, set to 1 liter) as is known, or the material filling chamber (2) can be used.
May be provided with a level detector (not shown) for detecting the filling amount of the material (M). The mounting method and mounting position of the nozzle (11) are not limited to those of the above-described embodiments, and can be appropriately changed in design. Two or more material outlets (3) are formed, and nozzles (11) corresponding to the material outlets (3).
)... (11) can be provided at opposing positions and transported by pressure to a plurality of locations, or can be transported by suction to a plurality of locations. Although the material supply device (F) for the pneumatic transport is a supply device for the pneumatic transport device, the material supply device (F) may be provided, for example, below the collector (26) shown in FIG. 3 and used as a discharge device. In each embodiment, the material, size, shape and the like of the transport pipe (5) are arbitrary, but are as small as 5 to 20 mm, for example, so as to have an inner diameter several times the diameter of the material (M) to be transported. If it is formed into a tube with a diameter, the material (M) can be transported to the destination with a small air volume and low air velocity, and the piping space can be small, so it is not bulky and the transportation cost is low,
Piping can be done freely. It has many advantages, such as the ability to easily transport a small amount of material as in a small synthetic resin molding machine and the prevention of blockage of the material (M) in the transport pipeline. Also, if the transport pipe (5) is formed of the same material as the material to be transported (M), the transport pipe (5)
This has the advantage that even if the inner wall itself is worn by the material (M) and crushed, it can be used without being a foreign substance. (Effects of the Invention) (1) According to the first aspect of the present invention, the material filling chamber is a disk-shaped thin layer space so that the material is filled in a thin layer, and the material filling chamber located above the nozzle. A baffle plate for adjusting the opening cross-sectional area formed between the inner wall surface of the material filling chamber and
Since it faces so as to intersect with the flow direction of the material, the supply amount of the material can be reduced in the thin layer space, and in addition, the baffle plate is formed between the inner wall surface of the material filling chamber. By adjusting the opening cross-sectional area of the opening, not only the material is supplied in a thin layer at the baffle portion, but also a space is formed downstream of the baffle plate, and the material is premixed in the space portion. Later, since the material is fed from the material outlet of the supply device main body, there is a remarkable effect that the material is reliably prevented from being clogged. (2) According to the second aspect, the baffle plate is formed so as to protrude at one end side of the connecting short pipe connecting the material outlet of the supply device main body and the transport pipe, so it is necessary to provide a member dedicated to the baffle plate. And the structure is simple. As described above, according to the present invention, the effect of the thin-layer space and the baffle plate, the fact that the material inlet is formed at the upper end side of the material filling chamber and the material outlet is formed at the lower end side, and compressed gas or suction from the nozzle etc. The clogging of the material and the excessive supply of the material in the material filling chamber are eliminated by the synergistic effect with the effect by the gas, so that even in the case of using a small-diameter transport pipe, the material can be transported in a stable state without clogging.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows an embodiment of the present invention. FIG. 1 is a longitudinal sectional view of a main part of the first embodiment,
FIG. 2 is a reduced plan view of a supply device main body of the first embodiment, FIG. 3 is a side view showing an application example of the first embodiment, FIG. FIG. 5 is a longitudinal sectional view of a main part of the third embodiment, and FIG. 6 is a longitudinal sectional view showing another example of application of the material supply apparatus of FIG. (F) ... material supply device for pneumatic transportation, (M) ... material, (S) ... cross-sectional area of opening, (X) ... space, (1) ... supply device body, (1a) ... body, (1b) ... Lid, (1c) ... material inlet, (2) ... material filling chamber, (2A) ... thin layer space, (3) ... material outlet, (5) ... transport pipe, (7) ... baffle plate, (10) …
Power source, (11) nozzle, (12) outlet, (18) secondary air inlet, (20) gas inlet.

Claims (1)

Claims (1) A supply device main body in which a material inlet is formed at an upper end and a material outlet is formed at a lower end, and a material filling chamber is a disk-shaped thin space so that the material is filled in a thin layer. And a transport pipe connected to a material outlet of the supply device main body, a nozzle provided to face the material outlet, and a pneumatic source connected to the nozzle or the transport pipe, and supplied into the supply device main body. A material supply device for a pneumatic transport device configured to transport the material through a transport pipe by virtue of a pneumatic source, wherein the material outlet is provided at a position lower than the material inlet, and the material is the material. The baffle plate for adjusting the cross-sectional area of the opening formed between the inner wall surface of the material filling chamber and the material filling chamber above the nozzle is provided in the material filling chamber located above the nozzle. Crosses the flow direction of Material is transported in a space formed downstream of the baffle plate while being premixed by the gas ejected from the nozzles. apparatus. (2) The material supply device for a pneumatic transport device according to claim (1), wherein the baffle plate is formed so as to protrude from one end side of a connecting short pipe connecting the material outlet of the supply device main body and the transport tube.